Product Focus
Sakagami NMY — NBR Rod Seals for Small Diameter Hydraulic Cylinders
Compact NBR rod seal for small-bore hydraulic cylinders. Rod sizes 3–30 mm, up to 21 MPa with backup ring, JIS B 2401 P-series gland dimensions.
- Reading
- 4 min
- Updated
- 2026-07-22
- Published
- 2026-07-22
- Category
- Product Focus
The Sakagami NMY is a compact NBR hydraulic rod seal designed for small diameter cylinders where installation space is limited. Its compact profile, low friction characteristics and robust sealing performance make it suitable for a wide range of industrial hydraulic applications.
Specification
| Parameter | Value |
|---|---|
| Material | RN906 nitrile rubber (NBR) |
| Rod sizes | 3 mm to 30 mm |
| Maximum pressure (no backup ring) | 14 MPa |
| Maximum pressure (with backup ring) | 21 MPa |
| Maximum speed | 0.5 m/s |
| Temperature range | −10 °C to +80 °C |
| Matching backup rings | T2 P bias-cut or T3 P endless |
Design and installation
The NMY uses a compact cross-section designed to fit gland dimensions based on JIS B 2401 P-series O-ring standards, making it suitable for compact hydraulic cylinder designs where installation space is limited.
Typical applications
- Small-bore hydraulic cylinders
- Hydraulic valves
- Operating mechanisms
- Solenoid equipment
- Compact hydraulic power units and Japanese OEM equipment
Standard sizes available
NMY-3, 4, 5, 6, 7, 8, 9, 10, 10A, 12, 14, 15, 16, 18, 20, 25 and 30.
Selection and groove design
The Sakagami catalogue also provides detailed groove dimensions and extrusion-limit guidance based on operating pressure, diametral clearance, seal hardness and backup ring arrangement, enabling correct seal selection and installation.
Manufactured in Japan by Sakagami and supported by Sealparts for OEM production, maintenance and replacement applications.
Frequently asked questions
- What is the maximum pressure of the Sakagami NMY?
- 14 MPa without a backup ring, 21 MPa with a T2 P bias-cut or T3 P endless backup ring.
- Which rod sizes does the NMY cover?
- Rod sizes from 3 mm to 30 mm, with standard variants NMY-3 through NMY-30 including 10A.
- Which gland standard does the NMY follow?
- The NMY is designed to fit gland dimensions based on JIS B 2401 P-series O-ring standards.
Related products
Materials
Standards
Related articles
- Product FocusSakagami Profiles — Complete SummaryOne-page summary of every Sakagami Seisakusho seal profile: hydraulic, pneumatic, dust seals, wear rings and accessories with material, pressure, speed and temperature ratings.
- Technical ArticlesJapanese Industrial Seals: Finding Replacements for NOK, Sakagami and Machine Tool SealsHow to identify and replace Japanese oil seals and hydraulic packings — NOK type codes, Sakagami profiles, JIS glands, machine tool seals and what evidence we need.
- MaterialsNOK O-Ring Materials — JIS Classes, Compound Codes and Test DataTechnical reference to NOK O-ring materials: compound codes (A305, E116, S503, F201, G636, T222), JIS B 2401 material classes, service temperatures, compression set, TR10 and volume-change data for JIS O-rings.
- StandardsO-Ring Size Standards — ISO 3601, JIS B 2401, AS568 and How to Cross ThemDecode O-ring size codes across ISO 3601, JIS B 2401 P/G/V, AS568 dash numbers, BS 1806 and JASO — with cross-section tolerances and a method for identifying an unknown ring or groove.
Engineering enquiry
Need help specifying or replacing a seal?
Send dimensions, existing markings or a sample. Sealparts engineers respond in 1–3 working days.